Dental articulator.



Patented July 7, 1914.

R. HARDIE.

DENTAL ARTIGULATOR.

APPLICATION FILED rmm, 1914.

W/T/VEJJfS:

THE NORRIS PET ERS C0,. PHOTO-LITHD" WASHINGTON. D- C.

-: rrn s'rarns PATENT FFI ROBERT HARDIE, OF ASI-IFIELD, NEAR SYDNEY, NEWSOUTH WALES, AUSTRALIA.

' DENTAL An'rIcuLA'ron.

I Patented July 7, 1914'.

Application filed February 4, 1914. Serial No. 816,421.

To all whom it may concern Be it known that T, ROBERTITARDIE, a subjectof the King of Great Britain, residing at No. 8 Bland street, Ashfield,near Sydney, in the State of New South Wales and Commonwealth ofAustralia, brass finisher, have invented new and useful Improvements inDental Articulators, of which the following is a specification.

This invention relates to dental articu lators which have adjustableparts and it has been specially devised in order to pro vide an improveddental articulator of simplified and cheap construction in which moldsfor artificial dentures may be readily affixed in working position andmay be easily and quickly removed therefrom without being broken orinjured and in which also the relative position of said molds may bemore expeditiously adjusted at the will of the worker than heretofore.

According to these improvements a vertical distance pillar is formedintegral. with or fast to a fixed lower arm and it has a central hole orthrough the greater part of its height to slidably receive a verticalstem whose height is adjustably fixed by means of a set screw. This stemcarries on its upper end the hinged upper arm resting upon the upper endof a screw pin passing through a lug on the inner side of said distancepillar and having a jam nut abutting thereon. The upper movable arm isconstructed of two leaves the lower one of which is hinged to the upperpart of the beforementioned slidably adjustable stem of the verticaldistance pillar while the upper leaf is horizontally adjustable inrelation thereto by means of ion gitudinal slot and a clamping screw.Each arm is spread at its free end and has inwardly directed lugs whichfor the upper arm are in combination with a movable clamping piece whichis carried upon the arm in a slot through and is operatable by stempassing through lug thereon and having abutments against another similarlug by collars on said stem and. which for the lower fixed arm are incombination with a clamp piece fast on a screwed stem passing throughthe distance pillar and having jam nuts on each. face thereof. But inorder that this invention may be easily carried into efiect it will nowbe described with reference to the drawings slot extending from the topboth leaves thereof means of a screwed. a female thread in aaccompanying and forming part of this complete specification in whic hFlgure 1 is a perspective view and Fig. 2

a longitudinally central sectional elevation of dentalarticulator-embodying these pres-.

ent improvements.

The distance pillar 3 carries one end of fixed arm 4, on its lower endand it has a central hole or slot 5 in it to receive vertically slidable.stem 6 with or without a feather 7 and adapted to be secured inposition by a set screw 8. A lug 9 is provided on the inner side ofpillar 3 and adjustable screwed pin 10 having am nut 11 projectsupwardly therethrough and forms a rest for the hinged upper armconsisting of two leaves 13 and 14: the lower one (13) of which ishinged to said vertically adjustable stem 6 while on it the upper one(14) is longitudinally horizontally adjustable by means of slot 15 andclamp arm is spread at its free end and has two inwardly directed lugs17. Upon the upper arm 12 the movable clamping piece 18 has a lug 19extending through slot 20 and having a female screw adapted to receive ascrewed stem 21 which passes through lug 22 on upper leaf 14 and hasabutment collars 23 on each side thereof and a milled head 24 on itsend. The lower fixed arm supports a similar clamp piece 18 upon ascrewed stem 26 which passes loosely through orifice 27 in pillar 3 andhas am nuts 28 on each side thereof.

In use a denture mold is placed in position on each arm between the lugsor stops 17 and clamp piece 18 and firmly fixed therein by means ofscrewed stem 21 while the upper leaf 1% of the upper arm is adjustedbymeans of clamping screw 16 and slot 15 and desire 1. In dentalarticulators the combination screw 16. Each with a hinged arm spread atits'free end and having inwardly directed lugs witha movable clampingpiece of clamping piece in a slot through sald arm a lug on said andhaving a female screw a screwed stem passing through said female screwand having two collars and a lug upon the arm to 2.111 dentalarticulators' the combination With a fixed lower arm spread at its free.

end and having inwardly directed lugsof a clamping piece carried on ascrewed stemv passing through the fixed support of sald arm and adaptedto-be held by jam nuts substantially as herein described and ex 3; Indent-a1 articulators, in combination,

'a-distance pillar, a fixed loWer arm carried @there'by, said arm'beingspread at its-free end and having inwardly threaded stem passing throughsaid pillar;

directed lugs, a

means for holding said stem in position, aclamping arm being spread atits free end and havinginwar'dly directed lugs, a clamping piece 2 Intestimony whereof I have signed my name to this specificat on 1n thepresence'gs of two subscribingWitnesses. 1 ROBERT HARDIE. Witnesses: r

PERCY N EWEL HAR'. :I-IILL.

Copies 01 this-.patent'may be obtained for five cents each, addressingthe Commissioner of Patents, washington D. 0. a

piece carried by sa d stem, a hinged-arm supported uponsaidpillar, said

